Gas Leakage Detector Using Arduino

Modulino® Buzzer

Arduino Uno Case - Black

Breadboard wire bundle

Arduino IDE 2.0 (beta)

Grove - OLED Display 0.96"

220Ω Resistor

<html><body><h3><strong>Project Overview – Gas Leakage Detector using Arduino</strong></h3><p>The Gas Leakage Detector using Arduino is a safety-focused embedded system designed to detect the presence of hazardous gases like LPG, methane, or propane in the surrounding environment. The project leverages an MQ-series gas sensor (MQ-5) interfaced with an Arduino Uno microcontroller, which continuously monitors gas concentration levels and takes immediate action when unsafe levels are detected.</p><p>The sensor produces an analog signal proportional to the gas concentration, which the Arduino processes and compares with a predefined threshold. If the gas level exceeds this threshold, the system instantly activates visual (LED) and audible (buzzer) alerts to warn the user. To enhance safety, a relay module can also be integrated to automatically switch off electrical appliances or activate exhaust fans, thereby preventing accidents.</p><p>This project not only demonstrates the use of sensors and microcontrollers in real-world applications but also highlights the importance of automation in safety systems. Its low-cost design, ease of implementation, and practical utility make it suitable for homes, kitchens, laboratories, and small industries.</p><p></p><figure><img src="https://projects.arduinocontent.cc/b54d2c6a-aa8a-4df8-8142-787e790f4fac.png"/><figcaption>Gas Leakage Detector Using Arduino</figcaption></figure><p></p><h3>Key Features:</h3><ol><li>Gas Detection using MQ-5 sensor (LPG, methane, propane).</li><li>Real-time Monitoring with Arduino Uno.</li><li>Immediate Alerts through buzzer and LED indicators.</li><li>Optional Relay Control to cut off appliances or trigger ventilation.</li><li>Compact and Low-Cost DIY design for personal and industrial safety.</li></ol><h3><strong>Components Used</strong></h3><ol><li>Arduino Uno – Acts as the central controller.</li><li>MQ-5 Gas Sensor – Detects gas concentrations and provides an analog signal.</li><li>Buzzer – Produces an audible alarm when gas leakage is detected.</li><li>LED Indicators – Provide visual alerts (safe vs. unsafe conditions).</li><li>Relay Module (Optional) – Automatically switches appliances/fans.</li><li>Power Supply – Provides a stable DC voltage for the Arduino and the sensor.</li></ol><p></p><p></p><figure><img src="https://projects.arduinocontent.cc/450e9f44-d1f6-488e-b948-162ebc5aefbf.jpg"/><figcaption>Components</figcaption></figure><p></p><h3><strong>Working Principle</strong></h3><p>The MQ-5 sensor continuously measures the concentration of gases in the surrounding air.</p><p>The analog signal from the sensor is read by the Arduino Uno’s ADC (Analog-to-Digital Converter).</p><p>The Arduino compares the sensor value against a predefined safety threshold.</p><p>If the gas level is below the threshold, the system remains in normal mode (LED indicates safety).</p><p>If the gas concentration exceeds the threshold, the Arduino triggers the buzzer and LED alarm.</p><p>Optionally, the Arduino can activate a relay circuit to cut off appliances or switch on a ventilation fan.</p><p></p><p></p><figure><img src="https://projects.arduinocontent.cc/34891dea-3386-4a05-862d-72b83d623102.png"/><figcaption>Circuit Diagram of Gas Leakage</figcaption></figure><p></p><h3><strong>Applications</strong></h3><ol><li>Residential kitchens – Detecting LPG leaks from stoves or cylinders.</li><li>Laboratories – Preventing accidents from methane or propane leaks.</li><li>Small industries/workshops – Ensuring worker safety.</li><li>Storage areas – Monitoring confined spaces for gas accumulation.</li></ol><p></p><h3><strong>Conclusion</strong></h3><p>The <strong>Gas Leakage Detector using Arduino</strong> provides a practical and cost-effective solution for preventing accidents caused by gas leaks. By combining a sensitive MQ-5 sensor with the processing capability of Arduino, the system ensures timely detection and reliable alerting. Its modular design makes it suitable for both academic demonstrations and real-world deployment, proving how embedded systems can enhance safety and automation in everyday life.</p><p></p><figure><iframe src="https://youtu.be/QIbamy-7NNU"></iframe></figure><p></p></body></html>

Gas Leakage Detector Using Arduino

Build a budget-friendly gas leak detector using Arduino and the MQ-5 sensor. It triggers an alarm and LED when unsafe gas levels are detected.